Too bad you aren't departing thru Aruba with a overnight. Flying Fishbone was a clear favorite (amongst many destinations). You actually sit at a table with your toes in the water in their little cove which is also lit up at night. Seafood was awesome. Our other awesome meal there was a multi-course private dinner for two right on the beach at the Bucuti! My wife really, really, really liked that.
Back on Bonaire, its been too long clearly remember a winner. I remember sitting outside on the water at Richard's (nice, good food, Richard was cool, wait staff was so-so). Also many years ago at the Plaza they did a pretty nice meal at their small beach restaurant (Tipsy Seagull). It was pretty close the water, very nice setting. On a much later trip the group tried it and was so-so. I remember Captain Don's dining was on the water's edge. And I think the one next door (Lion's Den) was also on the water.